# Cooler Master MasterLiquid ML120L RGB CPU Cooler Review

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#### Crashman

##### Polypheme
Former Staff
Great job Garrett!

#### trinergy

##### Prominent
Do you think adding an extra fan would make a difference at half speed? Also I didn't see that you mention extra screws are provided for an extra fan. Although currently this fan needs to be imported from Taiwan for \$17.99 @ newegg from a different reseller.

#### Olle P

##### Distinguished
Adding an extra fan should lower the temperature as well as increasing the noise and cost.
Better to just run the provided fan at higher speed since the increase in noise is much lower than could be expected...

... speaking of which:
Exactly how is the noise measured?
It only says that it's done by a mediocre audiometer (+-2dB or so at relevant levels) and the result is "adjusted to 1m".
* Where is it measured?
* ... "to one meter" in what direction?
* What is the background noise level?

Also the "Noise efficiency" formula is totally flawed:
By the formula 50C dT @ 50 dB is just as good as 10C dT @ 10dB, which it obviously isn't!
A step in the right direction would be to use the difference in cooling and noise between fans at half speed vs full speed.
( (dT(50%) - dT(100%) ) / ( Noise(100%) - Noise(50%) )
That way you see some actual efficiency in terms of noise cost to improve cooling.
To make it even better the noise value should be made linear in the formula.
Linear noise = 10^([dB]/10)

None of those changes make any sense unless the measured noise values are reliable in the first place though...

#### Crashman

##### Polypheme
Former Staff
Measured 45° off the edge of that fan and generalized to 1m by subtracting 12db. We know it isn't exact but if everything is measure the same way then all the numbers are correct-enough in relationship to each other.

But you're right about the desire for linear noise conversion in the cooling-to-noise chart, I should to to the reviewers about it.

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